Wire-nail-cutting die.



PATBNTED NO V. 14,1905.

J. WIKSGHTRM. WIRE NAIL CUTTING DIE.

APPLICATION FILED NOV. 24, 1903.

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UNITED STATES PATENT oEEroE.

wmE-NAlL-CUTTING DIE.

Specification of Letters Patent.

Patented Nov. 14, 1905.

Original application filed May 10 1902, Serial No. 106 ,773. Divided and this application filed November 24,1903. Selial No. 182,552.

To a/ZZ whom, it muy concern.-

Be it known that I, J AKOB WIKSCHTRM, a citizen of the Empire of Russia, and a resident of Dsseldorf, Germany, have invented certain new and useful Improvements in Wire- Nail-Cutting Dies, of which the following is a specification, the present application being a division of my application for United States patent on a machine for manufacturing wire nails filed May 10, 1902, Serial No. 106,773.

This invention relates to wire-nail-cutting dies; and its objects are to provide a die, or, to putit more exactly, a pair of dies which simultaneously and without waste of any kind produce two wire tacks or wire nails, said tacks or nails being by virtue of the special shape of the dies separated from each other and at the same time provided with points by a single movement of the dies. The present die has the great advantage over other dies based on the same principle that owing to the special form of the die the points are made perfectly central.

In the annexed drawings, Figure 1 represents my improved die, a in plan view, and c in elevation from both sides, and 0l in end view. Figs. 2 and 3 illustrate the action of the die.

Similar letters and figures of reference correspond to similar parts throughout the several views.

1 indicates one of my improved dies, and 2 is another die formed symmetrically to the first die.

The die has the shape of a parallelepipedon of trapezoidal cross-section. To facilitate the mounting, a prismatic extension p of rectangular cross-section is provided. The die is provided with a shoulder formed by two triangular surfaces o and g, which are respectively perpendicular and parallel tothe longitudinal axis and have their apices toward the same side, and by triangular surfaces l and L, which are respectively perpendicular and parallel to the axis with their apices toward the same side, but the opposite one to the triangles c and g. From the edge of the die is cut away to form a chamfer f, in-

clined to the longitudinal axis. Three p'rojecting edges 0l 7/ are thus formed and two rentrant angles 8, being the actual cutting edge and the bending of the wire being performed through cooperation of the edge with the edge /5 of die 2. This die 2 is formed symmetrically to die 1 and is reversed and placed against the latter at an angle of one hundred and eighty degrees.

' The action of the dies is as follows: If 1 is the movable die and 2 the stationary die, the Wire introduced is placed in the die 1 in such a manner as to lie approximately at the angle" formed by the points of the surfaces L and d. When thereupon the die 1 is moved toward the stationary die, the edge of thelatter pushes that part of the wire which projects upwardly beyond the edge over the same onto the surface g, the surface c limiting the yielding. The part of the wire which remains below thecutting-surface is prevented from yielding by the surface g and c of the stationary die. When the dies approach each other still further, the edges and shear off the wire bent over the shoulder and form the points in the pyramidal recess produced by the surfaces c g el /2/ and c', g', d, and la. Exactly-centered points are thus produced.

Having described my invention, what I claim is- 1. A pair of nail pointing and cutting dies, each provided with two transverse notches in step relation, the bounding' surfaces of said notches being triangles, the points of the triangular surfaces of one notch being on one side of the die and the points of the triangu lar surfaces of the other notch being on the other side of the die, one of the surfaces of one notch merginginto one of the surfaces of the other notch to form a transverse cutting edge; one of the dies being further provided with a chamfer extending from one of the notches to the front face of the die and in advance of the cutting edge.

2. A pair of nail pointing and cutting dies, each provided with two transverse notches in step relation, the bounding surfaces of said notches being triangles, the points of the triangular surfaces of one notch being on one to the front face of thedie and iny advance of side of thedie and the points of the trianguthe cutting edge. I0 lar surfaces of the other notch being on the g The foregoing specification signed this 26th other side of the die, one of the surfaces of day of October, 41903.

one notch merging into one of the surfaces of JAKOB WIKSCHTRM. the other notch to form a transverse cutting In presence ofedge; each die being further provided with a J. GREEN,

v chamfer extending from one of the notches l C. VON GRUELEER. 

